Does anyone know if they resolved the issue with the nVidia-proprietary GLX drivers? And, if so, which version?

Which version are you using by the way? We have success reports for 190.42-r3 and 195.36.24. I'd like to confirm that your version number is lower or higher than that._________________http://phajdan-jr.blogspot.com/

@phajdan.jr: I am running 185.18.36. I will try an upgrade when I get a chance to actually log off my desktop for a while. If my nvidia-drivers package is that out-of-date, I imagine there will be many other upgrades I'll probably need to do to get everything to run smoothly.

And thanks to all for helping me out on this. Always easier to solve a problem with more than one pair of eyes on it.